Which event can cause slumps, landslides, and mudflows to occur?

earthquakes

hurricanes

snowfalls

thunderstorms

An event that is able to cause slumps, landslides, and mudflows to occur are;

A. Earthquakes

Slumps usually occur after an earthquake, where it is able to cause slump land to sink.

Landslides occur when earthquakes occur on an area/areas with steep slopes. When the soil slips, it causes a landslide.

Mudflows can accompany heavy rains or follow droughts, earthquakes, or volcanic eruptions. Mudslides develop when water rapidly accumulates in the ground thus results in a surge of water-saturated rock and earth.

If Earthquakes happens to be incorrect, you have hurricanes as an option, as it is most likely to create half the debris.